/*
 * The MIT License
 * 
 * Copyright (c) 2011 Takahiro Hashimoto
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.taobao.top.link.embedded.websocket.frame.rfc6455;

import java.io.UnsupportedEncodingException;

import com.taobao.top.link.embedded.websocket.frame.rfc6455.FrameBuilderRfc6455.Opcode;

/**
 * The Class TextFrame.
 *
 * @author Takahiro Hashimoto
 */
public class TextFrame extends FrameRfc6455 {

  /** The converted string. */
  private String convertedString;

  /**
   * Instantiates a new text frame.
   *
   * @param header
   *          the header
   * @param bodyData
   *          the contents data
   */
  public TextFrame(FrameHeaderRfc6455 header, byte[] bodyData) {
    super(header, bodyData);
  }

  /**
   * Instantiates a new text frame.
   *
   * @param str
   *          the str
   */
  public TextFrame(String str) {
    super();
    byte[] body = convertStringToByteArray(str);
    setHeader(FrameBuilderRfc6455.createFrameHeader(body, false, Opcode.TEXT_FRAME));
    setContents(body);
  }

  /**
   * Convert string to byte array.
   *
   * @param str
   *          the str
   * @return the byte[]
   */
  private static byte[] convertStringToByteArray(String str) {
    try {
      return str.getBytes("UTF-8");
    } catch (UnsupportedEncodingException e) {
      ;
    }
    return null;
  }

  /*
   * (non-Javadoc)
   * 
   * @see java.lang.Object#toString()
   */
  public String toString() {
    if (convertedString == null) {
      try {
        convertedString = new String(contents, "UTF-8");
      } catch (UnsupportedEncodingException e) {
        convertedString = "";
      }
    }
    return convertedString;
  }
}
